Edmund h



EDlVlUND l-l. HEWlNS, OF l ,os'roit MAssAotfiUsirrrs.

Letters Putt-nt No. 05,476. dated Oclolmr lhill'.

IMPRQVEXENT IN VALVE-DEVICES FOR STEAM AND OTHER EYGL'EEERY,

' The Schedule referred to in these Lettere Patent and making part 0fthe name.

lie it known that I, lmtrxo H. Hnwixs, of Boston, in theconntyot'Sutioik, and ritateoiMassachusette, have made an invention ot'certainnew and nscfui Improvements in Steam and other Engincry;4 and f dohereby declurefthe tbllowing 'to' be a full, eleanan'd .ciples ot' myinvention.

The object ofithe invention 4herein described is t'o .produce @valve forthe various purposes ofa steam or.

air-engine, gas or waternneter, oiothr machineryl re- I, quil-'ingeslide-'val-ve, so constructed that the pressure shall be equal upon all'parts oi'l it,thus enablinr the valint'oghe easily and accuratelyoperated, and diminishinti'liear between' it and its seat, as well aspreserving. aA Aperfectly tight joint between the two.

'lhejin-'entiye genius ot' the most skilled mechanics has ,beentbryearstnxed to produce a device which shall travel over tlcad-poinisorcentres, and where' h lomentlnn from a ily-whee1 or otheranalogousdevice cennotfbe obtained or applied.

present. invention, a c denote thev two direct, and b, the exhaust-portsof a Steam-engine, the arrangement Inthe' drawings before mentioned asillustrating my of these ports being substantially the saine as in or-Adinaly steam-engines.

c, in the drawings, represents a block of metal placed over the ports a.a and b, such block, upon itsexterior, beiugfpyramidai in form,longitudinally ofthe path' ot' nioirei'nentot the valve, the interior ofthis 'olock c being Vrecessed.upon opposite sides' of its'centre invorder to prodncoopertures d d', which form prolongations of the puitsalc', communication between the oritic'cs or chambers d d' being cut otibya lcentral partition, c.

The centre ofthe bloeit c is' chambered or recessed,

es shown ntf; this recess being pyrainidal in outline, or correspondingtothe general outline of the blocli, and ibrminga continuation oftheexhaust-port b.

it valle, g, is placed within the valve'- chamber f, and operates inconjunction with twotwin valve-ports or criticos leit',niade'thrtwighthe partitions or valveeeats c' if, which divide or seperate the saidchamber f and the're'eessesor channels d d'.' c

'Upon'the outside of, and straddling the block-c, I mount a si-.shapedtilting valve, j, the -iuner faces of the 'twwhaiiies It it' oi whichact inconjunction with two twin 'oa'iilceor ports i i, formed throughthe'fi'nf l olinisdontcr' thc-es or eidesm otof the vsaid blockc, the fsidesithns becoming the primary or lerger valve-seats;-

'hc 'inner and smal-ler valve a is connected rigidly v in the directionot' the arrows, by th to the outer valve j, by rods, or theirequivalents, by

.which means the two valves are induced to travel orv more in unison.

lho primary or langer valve)- is suspended by means i of two cars o o,termed upon its opposite sides, troni a rod or fulcruin, 1), which issupported, at its opposite ends, in posts or standards q q, erected uponoppositisides otl the block c, or this fulcruin ori-od p may htin twoshort pins'upon each sido.

'Over the i'alve j I dispose a roller, r, such roller being pivotedwithin the lower end ot :i perpendicular rod or bar, s, which isSuspended from a horizontal plate-spring, t, this spring being in y turnsupported upon the top ofa cross-head, u, which unites the upperextremities of two vertical vibratinlr;- levers r c, these levers beingt'ulerunied at-theirlower endo, w'ithinthc body of motor to which theyare applied, these hilera being denoted by the letter 1r in thedra-triage.

'llhe vibrating levers pass upward tiny ich the tablet or shelf oi' themotor, in Awhich the ports a a', before -n'ientioned, are formed, theoriticcs tor thc passage ot` snclrlevers beingr shown at .1: .in l

The rod s, which snpportsthe roller r, should bei pronidedl with asuitable means of insu-ring its perpenv 4olicular condition, and' shouldalso-be provided with suitable stops or rests t-o determine its properlateral stoppages.

The operation. of the above-descrihed arrangement of parts' will hereadily understood by the intelligent' rea` der.

'Under thel condition shown inthe accompanying drawings, the porta isclosed, the port a' being open presents a clear,- pussage to one side oithe cylinder'or f y other motor, or a liquid meter, asthc case may 'bc.g

At the saine time the outer port lis closed by the Vah'ej, while theport h isopen, :irda free passage i obtadnediioln thc opposite side ofthe cylinder,instel',l 1 -or moton to the exhaust or discharge-pipe oroutlet l.

The pressure thus obtained, whether by means of a piston or othersuitable mechanism, 'i c, motion to theel-nis 't' c, in the directionoithe :nr ,ws thereon."

The lever/$.01' il-l'mS l ik, brille' conceited with thol the-u1 alsocross-head n and'spring t, as explained. 1

nenne ioreing the roller 'r to inonnt the incline ol the vnlve thiselevation ofthe roll and its rod cxeriin astraiu upon the's'pring.

- The instapt'theroller r has mounted and passed over the summitolthe'vaive j, the pressure oi.' the rolinpon the opposite inclineorgrade oi' the valve, through tho power of thespring t, will suddenlythrow'the valve from ofi the seat which it is, upon, and so as to coverthe opposite seat, thus opening the port Z, and closing the nort 3'... j

neatly-opens the port h'- and closes theport h. u It will thus he seenthetthe currents, whether steam,

xv'ogteri', or gas, are rezersedfxvh'ere therewes' :before a.

passage? from the supply-pipe'to the body or measuring-chamber ofthemachine' or cylinder, astheoase mnybe,.is novio. passage from suchbody to theel:-y

hnn'st, and versati `Then would'beg'in the move- .ment of the 'levens v'v back. to 'their 4positie ri-shown in the drawings, reversing-theoperation,

In' the case of s meter or any machine reqniring'a very slow motionwithout ly-'wheei,'.or. its eqnivlent,

for aidingI in passing the dead-point of' thevslve, it is f necessary tohuye s spring or movable weight to change the valve, which` motionshould be secured in the least rpossible time. y f

Whenever it he obtained, the deslredmotionof the valve may lbe than. theontlctpoxte-otlie inletJports-inay be placed further from the centre oi'point. of snspension iron which the vnlve-vibrates 'in changing than.the

outletports, or by both yineens combined; bud I 'think it wlibebettertekeep 'theyalve closed 'by mechanieu-l means, -In the osseo? themetenrthis 'will -be done hy mechanical` ineens,4 in-thjel form" of aspring pressure, or `friction may he introduced iii any cenv'en,d ientmanner.

The faces `of either direct ox exhaust-ports', or may he provided withany elastic materiel. to secure.,

certainty ot' closing the` same. y'

In my construction of valve, ohviztte ythe objection lmoivn.i 2. Thecombination end errang'ementfof theltwo' valvesj sind gf, whenrcombinedwitli suitable porlisof l entry'e'nddischarge for s tearn orother dld, and with efpwper actrmting mechanism, 'substjitislly ss extothe double puppet-valves new in use, wherein the valve and its, sectexpmid in di'erent degrees.'-

emonnt of diierence in expnnsion, in my invention th connections betweenthe vouter end inner valves 7 en g may be hung upon pins ait'eitheror'each end, and any -lengthemingA or contraction of these connectionswould move the exheustwelve up or down, en the case 'niny' he, theinclination fof-thc valve-faces being such that this, movement of the,exhcnstfvalve shall not carry itV one f from the seats. A

' VInpieceofthe chove#rleeei'lbfni-egnstrnctionotvelvc,` two singlepnepciwclves mcyfheennplbyed, connected by a, lever pi niedeof such:Sonnino telit the sects ion 'each side.

l v v y ,1, The two valvesj and g, with their: respective openis desiredto apply my'inventicn toa steam or other motoignrsvhenever thereis esnciently rapid motion, or suicient momentum may lin any way4ings,ingrese fond `egrens-passa.gen pertaining therelb,

comhi1ied,ncd arranged 4subs tentieiJIynel above made pleined'.V A

mid; the 'porto E l', passages d 11,1 'and ports h It'. y.

means l one or botli` ere retained upon theport closed by them until theroller rhos passedoverl'and' beyond 'qnnntty oi 'ilcid which' 'escapes'in the'intex'im being .very'slight,` sind 'of practically like ,amountunder all .conditicne v T. i

y o. Ineemoinetion with the shovedeecribed arrangeinent cf wives andportegespring"for'edfeotingftlie ie- .ciproczltione of the tivo. valvesj and y; for the pngpnse explained.A l

.EDMUND H. HEWINS.

' Vitliesees Fnnnoxcms,

FRANK FULLER.

f l In a. valve sncient'ly lnrgefto creste an appreciable med etitccentre, the exhaust-,valve being l with the cc-odinatezelementsthereofoonstrnotei' The duplex arrangement of tl xe'velve j endg,

4. 'The mivesljend g, as suspended fronts p'oint'- shove the apexoftlieformen", as represented, hfy which snchlapex, whenjh'e valve -issuddenly?"shifted,j the

